Put all the ingredients in the bowl to prepare the base, knead: 20 sec. speed 5.
Cover a baking tray (20×20), possibly with a removable bottom, with parchment paper and transfer the mixture obtained, pressing carefully with your fingers and compact well.
Bake in a preheated oven at 180°C for about 20 minutes, the mixture should just brown.
Put all the ingredients for the cream in the bowl, blend: 1 min and 30 sec. speed 3.
Pour the resulting mixture over the base and bake again in the oven at 180°C for about 10-15 minutes.
Allow to cool completely and unmold.
Cut into squares and serve sprinkled with icing sugar... Buon appetito!
They are kept in the refrigerator closed in an airtight container for 2-3 days.
For those who are intolerant to dairy products, it is possible to replace butter and classic milk with lactose-free ones.